Adolf Piening | |
|---|---|
 | |
| Born | 16 September 1910 Süderende on Föhr, German Empire |
| Died | 15 May 1984 (aged 73) Kiel, West Germany |
| Allegiance |  Nazi Germany (to 1945) West Germany |
| Service |  Kriegsmarine German Navy |
| Years of service | 1930–45 1956–69 |
| Rank | Kapitänleutnant (Kriegsmarine) Kapitän zur See |
| Commands | U-155 |
| Battles / wars | World War II |
| Awards | Knight's Cross of the Iron Cross |
Adolf Cornelius Piening (16 September 1910 – 15 May 1984) was a German naval officer. During World War II, he served in the Kriegsmarine and commanded the Type IXC U-boat U-155, sinking twenty-six ships on nine patrols, for a total of 140,449 gross register tons (GRT) of Allied shipping. Piening was a recipient of the Knight's Cross of the Iron Cross.
Piening spent two years as a prisoner of war and was released in 1947. He joined the new German Navy, which was established in 1956, serving until becoming team leader at the Bundeswehr Command and Staff College. He retired in 1969 with the rank of Captain at sea.